Illuminant device

Abstract

An illuminant device includes a housing, a circuit board, a plurality of LED dies, a light-transmitting layer, a controlling and driving module and a conductive connector. One end of the housing has a carrying part. The circuit board is disposed on the carrying part and has a circuit layer. The LED dies are placed on the circuit board and electrically connected to the circuit layer. The light-transmitting layer is circularly disposed on the circuit board and covering the LED dies. The controlling and driving module is placed on the circuit board and electrically connected to the circuit layer. The conductive connector is assembled with the other end of the housing and electrically connected to the circuit layer.

What is claimed is: 
     
         1 . An illuminant device comprising:
 a housing, one end of the housing comprising a carrying part;   a circuit board disposed on the carrying part, the circuit board having a circuit layer;   a plurality of light emitting diode (LED) dies placed on the circuit board and electrically connected to the circuit layer;   a light-transmitting layer circularly disposed on the circuit board and covering the LED dies;   a controlling and driving module placed on the circuit board and electrically connected to the circuit layer; and   a conductive connector assembled with the other end of the housing and electrically connected to the circuit layer.   
     
     
         2 . The illuminant device in  claim 1 , wherein the light-transmitting layer is circularly disposed on the circuit board. 
     
     
         3 . The illuminant device in  claim 1 , wherein a profile of the light-transmitting layer covering the LED dies is of arc-shape. 
     
     
         4 . The illuminant device in  claim 1 , further comprising a wavelength-converting matter disposed within the light-transmitting layer. 
     
     
         5 . The illuminant device in  claim 1 , further comprising two dams respectively disposed at two sides of the LED dies and around the LED dies, the light-transmitting layer is located within the dams. 
     
     
         6 . The illuminant device in  claim 1 , further comprising at least one bonding wire, one end of the bonding wire is connected to the LED die, and the other end of the bonding wire is connected to the circuit layer, the light-transmitting layer covers the bonding wire. 
     
     
         7 . The illuminant device in  claim 1 , further comprising a protecting layer covering the controlling and driving module. 
     
     
         8 . The illuminant device in  claim 7 , further comprising a surrounding wall, the surround wall is disposed on the circuit board and around the controlling and driving module, the protecting layer is located within the surrounding wall. 
     
     
         9 . The illuminant device in  claim 1 , further comprising a plurality of wires connected to the conductive connector and the circuit layer. 
     
     
         10 . The illuminant device in  claim 1 , wherein the LED dies are arranged on the circuit board with the same interval 
     
     
         11 . The illuminant device in  claim 1 , wherein the LED dies encloses the controlling and driving module. 
     
     
         12 . The illuminant device in  claim 1 , further comprising a plurality of fins radially extending from an external surface of the housing. 
     
     
         13 . The illuminant device in  claim 1 , further comprising a plurality of fixing elements penetrating the circuit board and fastening the circuit board on the carrying part. 
     
     
         14 . The illuminant device in  claim 1 , further comprising a lamp shade, the lamp shape is assemble with the housing, such that the circuit board, the LED dies and the controlling and driving module are arranged between the lamp shade and the housing. 
     
     
         15 . The illuminant device in  claim 14 , further comprising a wavelength-converting matter disposed within the lamp shade.